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CONFIG_X86_X2APIC: Support x2apic

General informations

The Linux kernel configuration item CONFIG_X86_X2APIC:

• prompt: Support x2apic
• type: bool
• depends on: CONFIG_X86_LOCAL_APIC && CONFIG_X86_64 && ( CONFIG_IRQ_REMAP || CONFIG_HYPERVISOR_GUEST )
• defined in arch/x86/Kconfig
• found in Linux kernels: 2.6.30–2.6.39, 3.0–3.19, 4.0–4.20, 5.0, 5.1-rc+HEAD

Help text

This enables x2apic support on CPUs that have this feature.

This allows 32-bit apic IDs (so it can support very large systems), and accesses the local apic via MSRs not via mmio.

If you don't know what to do here, say N.

Hardware

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The data is retrived from:

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• Linux Kernel Driver DataBase (LKDDb)

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